More nature, and times for the one for level 16!

Nature Expertise Variable actions Feat 15

General Skill
Prerequisites legendary in nature

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Even elder druids begin to bow to your power. Once per day, you can choose an primal 2nd level spell that is not uncommmon and attempt a DC30 nature check. If you succeed, you cast the spell using as many actions as that spell normally takes. You use either your Charisma or Wisdom as the spell casting ability and are considered legendary proficiency to determine spell casting attack or save DC.

Thoughts?